The following USE changes are necessary to proceed:
#required by media-libs/mesa-7.11.2, required by x11-base/xorg-server-1.11.2-r2[-minimal], required by x11-drivers/xf86-input-mouse-1.7.1, required by x11-base/xorg-drivers-1.11[input_devices_mouse]
=dev-libs/libxml2-2.7.8-r4 python

Use --autounmask-write to write changes to config files (honoring CONFIG_PROTECT).

The following USE changes are necessary to proceed:
#required by media-libs/mesa-7.11.2, required by x11-base/xorg-server-1.11.2-r2[-minimal], required by x11-drivers/xf86-input-mouse-1.7.1, required by x11-base/xorg-drivers-1.11[input_devices_mouse]
=dev-libs/libxml2-2.7.8-r4 python

The following USE changes are necessary to proceed:
#required by media-libs/mesa-7.11.2, required by x11-base/xorg-server-1.11.2-r2[-minimal], required by x11-drivers/xf86-input-mouse-1.7.1, required by x11-base/xorg-drivers-1.11[input_devices_mouse]
=dev-libs/libxml2-2.7.8-r4 python

Use --autounmask-write to write changes to config files (honoring CONFIG_PROTECT).